Stapling tool



7 Jan. 1,1 1,479,512

, 5. w. PERKINS STAPLING TOOL Filed Jan. 1'7. 1922 Patented den. 1, 1924.

star-Es SULAP, BUTTON FASTENEE COIKPANY,

TION F MAINE.

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enozaen w. PERKINS, or BOSTON, MassaonUsL-rrs, ASSIGNOR TO 'nnnroiv rainin- OF BOSTON, BEASSACHUSETTS, A CORPORA- STAPLIliTC-Z- TO 0L.

Application filed January 17, 1922.

To all whom it may concern:

Be it known that T, Gnonen VJ. PERKINS, a citizen of the United States, residing at Bos ton, county of Suffolk, State of Massachusetts, have invention a certain new and useful Improvement in Stapling Tools, of which the following is a specification, refer- 'nce being had therein to the accompanying lrawings. I

The invention relates to an improvement stapling tools. Tt has special reference to a tool for fastening two objects together by eans of metallic staples. It is especially intended for use in attaching buckles to 1 leather or other sheet material, although not limited to such use. The special object of the present invention is to form a small loop or eye in the head of the staple by shaping the eye over the cross-bar of the buckle at the same time that the legs of the staple are driven through the leatheror other sheet material and clinched.

The invention will be fully understood from the following description when taken in connection with the accompanying drawings and the novel features thereof will be pointed out and clearly defined in the claim at the close of this specification.

Fig. 1 is a side elevation of a hand tool embodying the invention; showing the jaws open preparatory to the stapling operation.

Fig. 2 is a side elevation showing the jaws in the position after the staple has been drivenv home and clinched.

3 is a section on line 3-3 of Figure 1.

Fig. 4c is a detail view of a staple such as is intended to be used with the tool.

Fig. 5 is an enlarged sectional view show ing a buckle attached to a piece of sheet material with the staple by means of the tool embodying the invention.

Fig. 6 is a plan view of a buckle stapled to a strap by a tool embodying the invention.

Referring now to the drawings, the tool comprises two members A. B pivoted to gether at 1, the member A comprising a handle portion 2 and a jaw portion 3, and the member B comprising a handle portion 4 and a jaw portion 5. The two members A, B are pivoted together something after he manner of a pair of pincers. The jaw portion 3 will be referred to for convenience as the upper jaw and the jaw member 5 as Serial No. 529,909.

the lower jaw. The staple, such'as intended to be used in the tool, is shown in Figure at and is designated by the numeral 6, said staple being of the ordinary shape of a staple with two legs and a connectinghead.

The jaw 3 is formed with a vertical slot 7 at its forward end and secured within this slot, as by screws 8 or any other suitable means, is a block 9 which will be referred to as the staple driver and'loop' former. Said block 9 is formed with two vertical holes 10-10 within which are loosely fitted the legs 11-11 of a U-shaped'member H,

which will be referred to as the staple" be inserted into the holder H from the lower end of the holder when the jaws are spread open, as in Figure 1, the head of the staple being uppermost so that the legs extend downward. 'lhe'staple should preferably beshoved up into the holder far enough so that the legs do not protrude below the lower end of the holder before the stapling operation is begun. I

A spring 13 lies on the upper face of the upper jaw 8, being secured to the jaw near its rear end as by a screw 14, the forward end being free and extending forward and l resting upon the head of the staple holder H, as shown in Figures 1 and 2, to give an elastic downward pressure thereon. Preferably a guide pin 15 is employed which projects from the upper side of the jaw and extends through a hole in the spring.

The lower end of the block 9 is formed with a groove 16 intermediate the two holes which form the guideway for the staple holder for the purposeof aiding in forming the loop in the staple, as will be hereinafter described.

The lower jaw 5 has fixedly mounted within it near its outer end an anvil 17 which is provided with a shank 18 extending down into a socket of the jaw formed to receive it. The anvil may. however, be secured to the jaw in any other suitable way. This anvil has formed in its upper surface two concave depressions 1919 which are all adapted'to cooperate with the driving member of the upper jaw to clinch the legs of the staple.

In Figure 6, there isshown a buckle ot the type with which the device is especially intended to be used. Said buckle comprises a frame 20 of substantially rectangular contour with rounded corners and a middle crossbar 21 to which is pivotally connected a tongue 22. 7 v

In operation, the strap, or other piece of sheet material 23 to which the buckle is to be attached, will be laid upon the upper side of the anvil 17 and the buckle placed and held upon the upper side of the strap 23 in proper position rorthe crossbar 21 to lie upon the rib 2 1, which forms the ridge between the two depressions 19-49 in the anvil. The staple having previously been inserted into the holder H of the upper jaw, the two handles 2, 4 will be squeezed toward each other, thereby closing the two jaws. After the upper aw has moved partway'down towards the lower aw, the lower ends of the legs 1111 of the staple holder will engage-the upper face of the strap 28 clamping the strap against the anvil 17, the spring 13 holding the staple holder with a yielding pressure against the strap 23. As .the aws are further closed the lower end of the block 9 will bear against the head of the staple and force it downward, the legs of the staple straddling the crossbar 21 of the buckle, and by still further continuing the pressure the legs of the staple will be forced through the strap and the ends will be turned up and clinched by reason of the concave formation of the depressions 19-19 in the anvil.

The groove 16 in the lower end of the block 9 will come down over the crossbar 21 of the buckle and the lower end portions 2525 of the block 9 on opposite sides of the groove 16 will engage the head of the staple at opposite sides of the median line of the head, forcing the staple home while the middle portion of the head which rests upon the crossbar 21 will be bent over the crossbar forming a loop 26, which is received in the groove 16. The loop thus formed is shown in Figure 5.

What I claim is: p

A hand stapling tool consisting of two aw members pivotally connected together, one of said aws being'provided with an anvil which has two depressed portions with an intermediate rib for clinching the staple, the

other of said jaws being provided with a cooperating staple driving member formed with two parallel" apertures, a U-shaped staple holder having two parallel legs-which pass loosely through the apertures in said driver, said legs having longitudinal grooves to hold a staple, said driving member being, formed with a transverse groove in its lower end intermediate the legs of the staple holder, the portions of the driving member on the opposite sides of the transverse groove engaging the head of the staple to drive the legs of the staple through the material to which the article is to be attached when the aws are brought together, and a spring which engages the staple holder and normally causes the lower end of the legs to project below the driver to clamp the said material to the anvil during the driving of the staple. V

In testimony whereof I affix my signature.

GEORGE W. PERKINS. 

